penetrating epoxy Cure time with acetone?

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I used Total Boat penetrating epoxy this morning with 1 part acetone added. This made a nice thin epoxy that I was able to paint carefully on a vertical surface that had rot damage and inject in pre-drilled holes. As it appeared that the wood absorbed the epoxy I added new. This went on for quite a while, and the epoxy remained workable for a long time, maybe an hour (at 70 degrees F, today). My question is whether the cure time is longer because of the acetone and how much longer? I will need a sandable surface to go on to the next step, which involves attaching another piece of wood using Flexepox. The normal day time temp here is usually 85-95 degrees.